Burrenton Shield-Bearers

The math is upside down: an attack trigger that hands out toughness only. The +0/+3 fires the moment you declare an attack, which staples a defensive bonus to the most aggressive event in the game and then does nothing aggressive with it. Power pumps win races; a toughness pump only wins trades, and only for a creature already in combat or about to take damage. The narrow seam this opens is the go-wide board, where one swinging Kithkin keeps a second attacker alive through a block: your attacker absorbs the blocker's damage, survives, and still deals its own to the defender. That is the whole use case, and it is a slim one. The buff never helps the Shield-Bearers close anything themselves; at best it turns a would-be trade into a one-sided exchange when the board is already deep. Five mana for a 3/3 prices that incremental defense too high, and the trigger never earns the slot back. The protection is not reactive in any meaningful sense, either: you cannot declare an attack in response to a removal spell, and if the opponent points removal at your creature once the trigger is on the stack, the removal resolves first and the +0/+3 lands on a corpse. Built as a common-rarity body for a tribal weenie deck wanting fatter toughness on its swings, it fills a defensive support role and little beyond it.